The mine map repository - a source of mine map data.
| Author: | Edgerton, Curtis D. |
|---|---|
| Year: | 1974 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Bureau of Mines |
| SUDOC: | I 28.27:8657 |
| Series: | Information circular 8657 |
| Subject: | Mine maps |
| Link: | https://hdl.handle.net/2027/mdp.39015078463075 |